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随着网络规模的不断扩大以及各种新型应用和服务的大规模部署,现有网络基础设施架构已经无法满足复杂多变的需求,网络僵化现象越发明显。被广泛认为是未来网络发展趋势的网络虚拟化技术为解决当前网络僵化问题提供了一条有效的途径。网络虚拟化泛指用于抽象物理网络资源的技术。这些技术使物理网络资源池化,进而以逻辑资源方式按需分配给用户,达到资源灵活分割或者合并的目的。用户可以独立地部署和管理他所拥有的虚拟网络,而不用关心业务在物理网
With the continuous expansion of the network and the large-scale deployment of various new applications and services, the existing network infrastructure has been unable to meet the complex and ever-changing needs. As a result, network rigidity becomes more and more obvious. Network virtualization technology, widely considered as the future trend of network development, provides an effective way to solve the current network inflexibility problem. Network virtualization refers to the technology used to abstract physical network resources. These technologies make the physical network resources pool, and then logically allocated to users on demand resources, to achieve the purpose of flexible segmentation or merger. Users can independently deploy and manage the virtual networks they have, without having to worry about the business in the physical network